Improvement in pitmen-rods



Edward la :si fmjlnwfemenf n pz'l-manfgods.

" "11,6542 PAmwED JUL- 41871 %bz 62.96 61.5'. .772 ww fm."

`resent straps of iron, which are provided with Uivrrnn 'rares EDWARD S. BLAKE, OF PITTSBURG, PENNSYLVANIA.

IMPROVEMENT IN PlTMEN-RODS.

`Specification forming part of Letters Patent No. 116,542, dated July 4, 1871.

To all whom it 'may concern:

Be it known that I, EDWARD S. BLAKE, of Pittsburg, in the county ot' Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Pitmen-ltods; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying dra-wing and to the letters Oi' ret'- erence marked thereon.

The nature of my invention consists in combining and arranging with the beam or brace ora pitman-rod straps, links, and set-screws, so that a compensation is obtained for the wear ot' the bi-asses around its axis.

To enable others skilled in the art to make and use my invention, I will proceed to describe inore fully its construction and operation.

In the accompanyingdrawin which forms part Ot' my sl'iecitication, Figure 1 is a side view otl my improvement in pitmen-rods. Fig. 2 is an edge view of the same.

Arepresents the beam or brace. B and C rephooks X, which are hooked into thc openings of the links I). In the strap C are fitted two setscrews, e, provided with jam-nuts o. rI'hepoints Of the set-screws e press upon the plate i', which rests upon the brass f around or on the axis la of the pitman-rod. The brass j", on or around or on the axis lL of the pitinan-rod, is held in position with relation to the axis h, by means of the strap B. y The oiiice ofthe jam-nuts ois to hold the setscrews c in a ixed position after being set for adjusting the brasses to the axes h and h.

The operation of adjusting the braces to the axes h and IL is as follows: The jam-nuts o are unscrewed and set-screws e turned so as to press against the plate or packing i,- this will force down the brass f to the axis h and at the same time draw up the strap C, which, drawing on the links D, will draw up the strap B and thereby draw the brass f' against the axis h.

From the foregoing description, it will be observed that the wear of the vbrasses f and j" is compensated for b y the combin ation and arrange ment ot' the several parts hereinbet'ore described, and that any lost motion of the pitnian-rod with relation to its axis can be taken up or repaired by simply turning the jam-nuts o o and set-screws The skillful mechanic will readily see that the construction of the several parts otA the pit-manrod may be varied for the purpose of adapting it to machines dii'i'erin g greatly from each other in form, construction, and use; therefore, I wish it clearly understood that I do not coniine myself to the exact construction ot' the several parts as described and shown, but reserve the right to vary their' constructioiri so as to adapt my improvement in pitmen-rods to all and every kind oil machinery requiring a pitman-rod.

Having thus described the nature Iand construction oi' my improvement, what l claim as ot my invention is l. A 1,)itman-rod, provided with straps, links, and set-screws, for the purpose of holding the brasses in close contact to the axis to which it may be connected, substantially as herein described.

2. A I iitman-rod, consisting of the brasses f, straps B and G, links D D, and set-screws e e, so combined and arranged with relation to each other that a compensation. is obtained for the wear of the brasses around its axis, substantially as herein described.

i E. S. BLAKE.

WVit-nesses:

A. O. JOHNSTON, J Anne J. JOHNSTON. 

